-40.89% is the change from 538 to 318
Calculation steps:
[( 318 - 538 ) ÷ 538] x 100 = -40.89%
Formula
Percentage change = [(318 - 538) / 538] x 100
Subtract the new number by the original number
318 - 538 = -220
-220 ÷ 538 = -0.40892193308550184
-0.40892193308550184 x 100 = -40.89%